Apidemo学习 SurfaceViewOverlay

/**
 * Demonstration of overlays placed on top of a SurfaceView.
 * 展示可以在surface上添加view
 */
public class SurfaceViewOverlay extends Activity {
    View mVictimContainer;
    View mVictim1;
    View mVictim2;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        setContentView(R.layout.surface_view_overlay);

        GLSurfaceView glSurfaceView =
            (GLSurfaceView) findViewById(R.id.glsurfaceview);
        glSurfaceView.setRenderer(new CubeRenderer(false));//绘制一个立方体,至于怎么绘制真的不是很清楚

        // Find the views whose visibility will change
        mVictimContainer = findViewById(R.id.hidecontainer);
        mVictim1 = findViewById(R.id.hideme1);
        mVictim1.setOnClickListener(new HideMeListener(mVictim1));
        mVictim2 = findViewById(R.id.hideme2);
        mVictim2.setOnClickListener(new HideMeListener(mVictim2));

        // Find our buttons
        Button visibleButton = (Button) findViewById(R.id.vis);
        Button invisibleButton = (Button) findViewById(R.id.invis);
        Button goneButton = (Button) findViewById(R.id.gone);

        // Wire each button to a click listener 
        visibleButton.setOnClickListener(mVisibleListener);
        invisibleButton.setOnClickListener(mInvisibleListener);
        goneButton.setOnClickListener(mGoneListener);
    }

    @Override
    protected void onResume() {
        // Ideally a game should implement onResume() and onPause()
        // to take appropriate action when the activity looses focus
        super.onResume();
    }

    @Override
    protected void onPause() {
        // Ideally a game should implement onResume() and onPause()
        // to take appropriate action when the activity looses focus
        //游戏应该在resume 和pause中实现一些逻辑
        super.onPause();
    }

    class HideMeListener implements OnClickListener {
        final View mTarget;

        HideMeListener(View target) {
            mTarget = target;
        }

        public void onClick(View v) {
            mTarget.setVisibility(View.INVISIBLE);
        }

    }

    OnClickListener mVisibleListener = new OnClickListener() {
        public void onClick(View v) {
            mVictim1.setVisibility(View.VISIBLE);
            mVictim2.setVisibility(View.VISIBLE);
            mVictimContainer.setVisibility(View.VISIBLE);
        }
    };

    OnClickListener mInvisibleListener = new OnClickListener() {
        public void onClick(View v) {
            mVictim1.setVisibility(View.INVISIBLE);
            mVictim2.setVisibility(View.INVISIBLE);
            mVictimContainer.setVisibility(View.INVISIBLE);
        }
    };

    OnClickListener mGoneListener = new OnClickListener() {
        public void onClick(View v) {
            mVictim1.setVisibility(View.GONE);
            mVictim2.setVisibility(View.GONE);
            mVictimContainer.setVisibility(View.GONE);
        }
    };
}

<!-- Demonstrates changing view visibility. See corresponding Java code. -->

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
        android:orientation="vertical"
        android:layout_width="match_parent"
        android:layout_height="match_parent">

    <!-- Here is where we put the SurfaceView, in a frame so that we can
         stack other views on top of it. 我们可以把其他view 放到这个surfaceview上-->
    <FrameLayout
            android:layout_width="match_parent"
            android:layout_height="0px"
            android:layout_weight="1">

        <android.opengl.GLSurfaceView android:id="@+id/glsurfaceview"
                android:layout_width="match_parent"
                android:layout_height="match_parent" />

        <LinearLayout android:id="@+id/hidecontainer"
                android:orientation="vertical"
                android:visibility="gone"
                android:background="@drawable/translucent_background"
                android:gravity="center"
                android:layout_width="match_parent"
                android:layout_height="match_parent">

            <Button android:id="@+id/hideme1"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_gravity="center"
                    android:visibility="gone"
                    android:text="@string/hide_me"/>
            
            <Button android:id="@+id/hideme2"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_gravity="center"
                    android:visibility="gone"
                    android:text="@string/hide_me"/>
                    
        </LinearLayout>
        
    </FrameLayout>
            
    <LinearLayout
            android:orientation="horizontal"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="center">

        <Button android:id="@+id/vis"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="@string/visibility_1_vis"/>

        <Button android:id="@+id/invis"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="@string/visibility_1_invis"/>

        <Button android:id="@+id/gone"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="@string/visibility_1_gone"/>

    </LinearLayout>

</LinearLayout>